Instruction manual

COPY
-1-
Dec./08/’06
Thank you for purchasing one of our TAKEGAWA’s products. Please strictly follow the following instructions in installing and using the products. Before
fitting the products, please be sure to check the contents of the kit. Should you have any questions about the products, please kindly contact your dealer.
Please read the following instructions before installation.
◎ We do not take any responsibility for any accident or damage whatsoever arising from the use of the products not in conformity with the instructions in
the manual.
◎We shall be held free from any responsibility or compensation whatsoever for any glitch in parts other than ours if the glitch takes place after installation
and use of this product.
◎ If you make alterations to the products, we shall be held free from any guarantee of them.
◎ You are kindly requested not to contact us about the combination of our products with other manufacturers'.
◎This kit is designed for exclusive use in the above-mentioned type of motorcycle only. (and frame number) Please take note that this product cannot be
mounted on other types of motorcycles.
◎ Fix this product correctly, referring to a right YAMAHA genuine parts service manual for your vehicle.
◎Before installation, prepare right tools and perform the work, strictly following the installation procedure with great care. Besides, this instruction manual,
as well as a YAMAHA genuine parts service manual, is written with those persons in mind who have basic skills and knowledge in tuning.
Therefore, we recommend those who are technichally inexperienced or do not have enough tools to ask a technically-reliable specialist shop for the
work.
◎ Clearance between a piston and a cylinder is designed to be narrow. Therefore, never forget to do shakedown.
◎ Because of its high compression ratio and improved airtightness, you will have to press down hard on the kick pedal when kick starting. Further, it may
be some times difficult to start with a self-starter even when the battery is fully charged.
◎ The installaiton of this product increases the heat release value of the engine, caused by the increase in power. Therefore, this kit is inadequate for the
long-time high-load driving.
◎ Some of bolts, nuts, dowel pins and packing will be reused. However, be sure to replace worn-down or severely-damaged ones with new ones.
・This is a bore up kit comprising of a cylinder and a piston, utilizing a stock cylinder head.
・This increases bore diameter from 52.4mm to 58.5, and engine displacement from 124 cc to 155, and compression ratio from 9.5:1 to about 11.4:1.
・The aluminum bore surface of the cylinder included in this kit is ceramic-coated. This keeps back the seizing and improves sliding.
Features
・Work only when the engine and the muffler are cool. (Otherwise, you will burn yourself.)
・Prepare right tools for the work, and do the work in the proper and right way.
(Otherwise, improper work could cause breakage of parts or injuries to yourself.)
・Always use a torque wrench to screw bolts and nuts tight and securely to the specified torque.
(Improper torque could cause these parts to get damaged or fall off.)
・As some products and frames have sharp-pointed or protruding portions, please work with your hands protected.
(Otherwise, you will suffer injuries.)
・Before riding, always check every section for slack in parts like screws. If you find slack ones, screw them securely up to the specified torque.
(Or improper torque may cause parts to come off.)
CAUTION
The following show the envisioned possibility of injuries to human bodies and property loss as a result of disregarding the following
cautions.
・Always drive the engine in a well-ventilated place, and do not switch on the engine in an airtight place.
(Otherwise, you will suffer from carbon monoxide poisoning. )
・When you notice something abnormal with your motorcycle while riding down a road, stop riding immediately and park your motorcyle in a safe
place. (Otherwise, the abnormaility could lead to an accident.)
・Before doing work, place the motorcycle on level ground to stablize the position of your motorcycle for safety's sake.
(Otherwise, your motorcycle could fall down and injure you while you are working.)
・Check or perform maintenance of parts correctly according to the procedures in the instruction manual or a service manual.
(Improper checking or maintence could lead to an accident.)
・If you find damaged parts when checking and performing maintenance of your motorcycle, do not use these parts any longer, and replace them
with new ones. (The continued use of these damaged parts as they are could lead to an accident.)
WARNING
The following show the envisioned possibility of human death or serious injuries to human bodies as a result of disregarding the
following cautions.
This product is so designed to achieve a higher compression ratio than stock engines. As for the fuel, high-octane gasoline should always be used. In
case regular gasoline is used, abnormal combusiton takes place, and the engine cannot achieve its original performance. Moreover, it is highly likely that
the piston will break down, leading to serious failure of the vehicle. Before installing, make sure that no regular gasoline remains in the fuel tank. In case
regular gasoline is remaining in the fuel tank, do replace it with high-octane gasoline.
！Caution about fuel to use！
Be sure to replace a spark plug with a hot-type spark plug CR8E (NGK) with high thermal value, or a hotter-type one. Subsequently, choose and use a
right spark plug with the right level, depending on the degree of burning of the spark plug electrode section.
！Caution about spark plug！
Cygnus X Bore Up Kit (155.6 cc) Instruction Manual
Item No.
Applicable to
：０１−０５−４４６０
：０１−０５−４４６１
：Cygnus X (XC125)
(Without cam)
(Cam included)